* 'master' of https://github.com/kubernetes/kubernetes.github.io:
Update some description about secrets
[Federation] Add a note about DNS API scopes to the Federation tutorial (#2943)
Delete the useless spaces in html files
Fix typo
update resource-usage-monitoring.md
* [Federation] Add a note about DNS API scopes to the Federation tutorial
Not sure this is the right place for this, but I wanted to get the text out somewhere before I forgot about it.
* Update set-up-cluster-federation-kubefed.md
* Update set-up-cluster-federation-kubefed.md
* Fix formatting of code blocks.